Maintaining hydraulic pressure. We are machines. The machine's components can only perform with a tightly regulated range of hydraulic pressures. That and a barely maintained level of red blood cells carrying oxygen.
That is why you don't poke a dead person's face. It makes it very difficult to pop the dent back out for the funeral.
I don't know why, but that comment made me involuntarily snicker, then I had an immediate feeling it was inappropriate to laugh...don't know why.
For some odd reason, it reminded me of my grandfather's wake, and my brother brought my five year old nephew to it. My grandfather was 94, and he had a very big French nose, laying on his back, it looked like a two car garage.
As my brother and his son knelt beside the corpse, my nephew looked up as his father, and with all the appropriateness and tact available to a five year old, he said: "Can I put my fingers up his nose?"
Even after all these years, it makes me grin to think of it, then for a split second, I have to think "Is that appropriate to laugh?"